Machine Design
The strength of a riveted joint is equal to

Crushing strength of rivet (Pc)
Tearing strength of plate (Pt)
Shearing strength of rivet (Ps)
Least value of Pt Ps and Pc

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Permit each leaf to act as an overhanging beam
Obtain variable moment of inertia (I) in each leaf
Have variable bending moment (M) in each leaf
Make M/I constant throughout the length of the leaf

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